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midterm2-2010

# midterm2-2010 - Name Student No Q4 Q5 Q6 TOTAL EXAM II(25...

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Name: Student No: ELE 312 DIGITAL ELECTRONICS EXAM II (25%) PART B Q4 Q5 Q6 TOTAL May 11 𝑡ℎ , 2010 Solve 2 questions from Part B, and 4 questions in total (from Part A and B). Good Luck! Q4. (25 pts) Consider the ECL circuit below. Assume all transistors are identical. 𝑉 𝐵𝐸 ( 𝐸𝐶𝐿 ) = 0 . 75 𝑉 𝑉 𝐵𝐸 ( 𝑆𝐴𝑇 ) = 0 . 8 𝑉 𝑉 𝐵𝐸 ( 𝐹 𝐴 ) = 0 . 75 𝑉 𝑉 𝐷 ( 𝑂𝑁 ) = 0 . 75 𝑉 𝛽 𝐹 = 49 a) Calculate the value of 𝑉 𝐵𝐵 b) Sketch the voltage-transfer characteristics (VTC) for the inverter, i.e. single input 𝑉 𝐼𝑁 = 𝑉 𝐼𝑁𝐴 = 𝑉 𝐼𝑁𝐵 . c) Calculate the average power dissipation for the inverter with 𝑉 𝐼𝑁𝐵 = 𝑉 𝐼𝐿 and 𝑉 𝐼𝑁𝐴 = 𝑉 𝑂𝐻 .

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Q5. (25 pts) Consider the TTL circuit below. Assume all transistors are identical. 𝑉 𝐵𝐸 ( 𝐹 𝐴 ) = 0 . 7 𝑉 𝑉 𝐵𝐶 ( 𝑅𝐴 ) = 0 . 7
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midterm2-2010 - Name Student No Q4 Q5 Q6 TOTAL EXAM II(25...

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